Elevator safety device.



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ELEVATOR SAFETY DEVICE.

APPUEAHON man FEB. :0. l9l5. RENEWED ms. :3, His.

1,278,726. Patented Sept. 10, 1918,

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STATES PATENT OFFICE.

ELEVATOR suni r DEVICE.

Spceifieation of Letteis Patent. Pafg nted s ept Application files ramar 1c; 1915: serial ts. 7332. seaseerebsiiafir 1;'1'l 8. seminar; 21am.

To all wiwm ifma concem V Be it known that I; Oneal Nrefii a citi zen of the United Statesnesiding a wash ington, in tlieifiistriet of Columbia; have rangement of parts whereby theelevatorcar is made to be inoperative wheni tire shaft door is open, thus obsessing the danger arising from cievator'shsft '(itiiii biligflieft open by the car operator after the car'has left the landing.

The object of m' invention is toprov'ide a device which will secureiyholdthedoor of the'welisifaft in a closed position, the fiste'ning device of which can only hereleased by thecar operator," and the means by which the lock of the door is released at the same time operates- GOlitttCt whereby the current ishrdfi'eiii Another objeeeef myinvention' is't'o provide'm'eans by which it is impossible toe ea the deals ofthe elevathf shaft while the car is at as" point in the sha it otiief thaii directly in rofitoithe door, and to unlock or release the wiifi'the'car ha's' reached the level of tho jla'iidiiig.

A' further obieet of my invention is to provide locking means for the messes-res upon the inside of the' weil shoftand means located in the car on tlfe' dpposite sid of the door from that upon which the controller is team sis g i thereby compelling the operator of the car to assume a position immediately in front of the door, with one hand on the controller and the other hand extended to the lock operating means, to hold the contact in operative position.

Finally, the object of my invention is to provide means whereby the current to the elevator car is broken when the shaft door is moved to an open position and must be moved to a locked osition before the car ma again be started Xith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as illustrated in the accompanying drawing, forming a part of this specification, and particularly pointed out in the claims.

In the drawings:

Figure 1 is a view in elevation, showing my improved locking device'in an unlocked position.

Fig; 2 is a similar view, showingithe lock in alocked position;

Fig. 3 is a view in elevation of the look lever, out of engagement? withthe locking plate.

Fig. 4 is e view-in elevation, showing; the

locking lever in engagement with'theioek in g iplate sectared oli tlie'dorii g; 5 rise seciaenai'view illustrating the position of the ear operator when the' ear is in moti'ozig fihe controller being upon one side of the eardobr frame and the lock op crating lever upon the'opposite side frame.

Fig; 6 is a sectional view of the shoe.

Fig. 'Z' isia perspective vievw of the door locking plate;

Fig. 8 is a sectional view on the line 2-2 of Fig. 6. V

Fig. 9' isa'view of the contact collar.

Fig. 10 is a perspective view ofthe shoe.

Fig. 11 is a plan view of the contact'mechan'isni, and

Fig. 12 is a sectionalview' of the contact mechanism.-

Inthe drawings 11 indicate the'landofrfheieievatorwell shaft, audit- 2 the doors thereof, which may beef anyinrdinary construction; On the innersnrisme of the well sha fn adj acent'the landings; I secure a bracket, 3, in any suitable manner. A lever,

pmvided at its upper end with cori'ugated reetenguleeshaped extension '5; and at the opposite end with a track, 6, is pivo ttrliy modified *in the sen sli'wft at each A projection, i, is formed intogrally with the lever at its lower end, to prevent the lever from swinging out at the top to be in the line of the car. On the floor, 8, of the elevator car I secure a support, 9, on which a hand lever, 10, is pivotally mounted. The lower end of the hand lever is provided with a shoe, 11, formed integrally therewith; the shoe, 11, being provided with flared ends, 12, which permit the shoe to be brought into a registering position with the track, 6, when it is desired to operate the locking lever, 41. A collar provided with a contact piece, 13, is secured by means of a set screw, 14, to the hand lever, 10. A spring, 10, is also provided to automatically withdraw the lever should the operator remove his hand therefrom. A guide plate, 15, is secured at each end to the wall of the car upon one side of the hand lever, which provides a guide for the hand lever so that the contact thereon may at all times be kept in line with a switch box, 16. The switch box, 16, is provided with two contact plates, 17 and 18, suitably secured to the bottom of the box casing; and to the upper inner surface of the box casing a support. 19, is secured. The front of the casing has an aperture rovided with an insulating collar, 20, in W ich a spring actuated plunger, 21, reciprocates. On the plunger, 21, is a contact key, 22; the key, 22, being removable through the aperture, 23, in the switch box casin It will e noted that the Contact is one of considerable length, the object of which will be hereinafter more fully explained.

A controlling device, 24, is located in the car in the usual position, but which in the operation of my improved locking device is to be located upon the opposite side of the door frame from that upon which the means for releasing the well shaft door is located, as illustrated in Fig. 5 of the drawings. A corrugated locking plate, 25, is secured to the inner surface near the bottom of a well shaft door, and immediately below the plate an elongated groove, 26, is provided. The object of the groove, 26, is to provide means for a pin, 27, mounted on the lever, 4, to register therein when the door is in a locked position, and when the door is in an open position the pin, 27, cannot register with the groove, 26, and as illustrated in Fig. 1, the contact is held in a broken position, thereby preventing the operator from obtaining current to move the car until the door has been moved in a closed position. The spring actuated plunger, 21, which carries the key, 22, is given a considerable degree of movement.

In the operation of my device, when the operator 0 the car desires to stop at any landing, the hand operating lever, 10, is drawn back a sufficient distance to permit the track to enter the shoe, and a further movement of the hand lever breaks the contact and at the same time the locking plate is released from engagement with the door locking plate.

It is believed that the operation, construction and arrangement of my improved elevator door safety locking device can be fully understood by the above description, it being noted that changes may be made in the proportions and details, without departing from the scope of my invention.

What I claim as new and desire to secure by Letters Patent is:

1. In an elevator safety door lock, a lever provided with a locking plate at one end and a track formed integrally therewith at its opposite end, suitably pivoted on the wall of the well shaft adjacent the landing, a lever having a flared end track shoe formed integrally therewith at its lower end, adapted to register with the track secured on the inner wall of an elevator shaft, as and for the purpose set forth.

2. In an elevator safety door look, a lever provided with a locking plate at one end and a track at its opposite end suitably pivoted to the inner wall of the Well shaft adjacent the landing, a contact box, and a lever carried by the car, said lever having a flared end, and provided with a track shoe formed integrally with its lower end, a contact secured to the upper end of said lever adapted to register with a contact box secured to the car, as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

OMAR I. NIGH.

Witnesses:

Amman D. SMITH, Jon. 0. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Wsshington, D. 0." 

